Refrigerating unit



Patented Nov. 20, 1934 UNITED STATES PATENT vOFFICE Divided and thisapplication September 18, 1931, Serial No. 563,618 l 4 Claims.

The present invention relates to a condenser unit comprising,essentially, a motor, a compressor, a coil, a fan, and a heat-radiatingenclosing hood for the coil, motor, and fan. The unit is so designedthat although it may be built into a refrigerating box at the factory,it may bev equally well applied to an ordinary ice box-to convert thesame into a mechanical refrigerator. The features of the generalassembly are disclosed and claimed in the instant application, which isa division of application Serial Number 435,889, filed March 14, 1930.

According to the embodiment of the invention to be describedhereinafter, the motor is mounted within the coil in coaxial relationthereto and the fan and compressor, which latter is preferably of therotary type, are coaxial with the motor. The elements are all supportedby a base plate, the motor and fan being disposed at one side of theplate and the compressor at the other side in a housing preferablyintegral with the plate. A hood of heat-radiating material surrounds thecoil in proximity thereto and has air openings through which air isdrawn and expelled by thel fan, the air in its passages through thelliood passing along'the coil to cool the same. The hood radiatesoutwardly heat transmitted thereto from the coil and also serves toprotect the mechanism enclosed by it. It offers a further advantage, asover an exposed coil, in that dust and dirt do not readily gather on itand it may be easily cleaned.

My invention is best illustrated by reference to the accompanyingdrawing which is an axial section through the preferred embodiment of myunit, parts being shown in elevation.

In the drawing, reference numeral 10 designates a circular horizontalbase plate having centrally thereof a cylindrical, depending integralskirt 11. Plate 10 is provided with a central circular aperture 12surrounded by an upstanding collar 13. vA condensing coil 14 rests on.the upper margins of plate. 10 with its axis perpendicular'to the plate.The coil outlet 15 to an expansion valve, not shown, passed downwardlythrough a peripheral recess 16 of plate 10.

An electric motor 17 is mounted on a tripod motor with its lower marginsresting against theV (Cl. (i2-115) periphery of plate 10, and, ifdesired, removably secured thereto,

Near its lower edge hood 19 is provided with a number of air holes 20,while 'at its top it is provided with a central air escape aperture 2100 through which the upper armature shaft bearing of the motor projectsfor convenientv oiling through duct 22.

Mounted on armature shaft 18 beneath the motor is a fan 23, here shownas comprising four blades, adapted, upon armature rotation, to draw airinto the hood through holes 20, circulate it upwardly along the coil,and expel it from the hood through aperture 21.

A conduit for the electrical conductors to the motor and to athermoswitch (not shown) is secured to the motor casing and extendsdownwardly through an aperture in plate 10. The conductors may be led tothe conduit 24 through a hole 20 of hood 19 and a T coupling 25Ainterposed in the conduit.

-To install the condenser unit in an ice refrigerator, it will beevident that it will only be necessary to cut holes in the T of the boxabove the ice compartment to receive pipe l15, conduit 30 24, and skirt11, plate 10 then being adapted to rest directly on the top T of the'box. l

The inlet end of coil 14, through a connection 26,'is in communicationwith the interior of skirt 11. l

Referring now to the drawing, skirt 11 is closed at its lower end bymeans of,a circular plate 2'7 having a fiat-topped, raised portion 28extending upwardly within theskirt. Portion 28 is centrally bored toreceive the lower end of shaft 18. Fixed to shaft 18 .immediately aboveportion 28, and having a lower iiat face resting upon the face of thelatter, is a cylindrical\block'29 fixed in position by means of a setscrew 30. Block 29 is provided with a number of bores parallel to shaft18 and with 'their axes defining a circle concentric with the shaft. Inthese bores are slidable pistons 31 whose upper ends are-guided in aflange 32 integral with block 29. A cam ring 34 is secured by means of aflange 35 to the lower mar- 10o 'gins of aperture 12 and has an axiallyprojecting cam face 36 opposed to and in the circle of pistons 31. v

Intermediate block 29 and flange 32 pistons 31 are provided withabutments 38. Interposed 105 between abutments 38 and block 29 arecompression springs 39 which yieldingly urge the upper chamferedextremities of pistons 31 against cam face 36. Upon rotation of block 29pistons 31 will be reciprocated by the cam and springs.

These pistons operateipon a fluid introduced.

into the interior of skirt 11v to compressvthe same.

Having described my invention, I claim 1. A condenser unit comprising ahorizontal base plate adapted to rest upon the top ora cabinet, a coilmounted on said plate with the axis thereof perpendicular to said plate,a motor mounted on said plate. in coaxial relation within the coil,L arotary compressor supported by the plate'at its` side opposite the coiland extending belowfthe top of the cabinet in coaxial relation tothemotor; anda drive shaft connecting the'xotor and'compressor.

2. A condenser unit comprising a horizontal baseplate adaptedtorest uponthe top of a cabinet, acoil moimted'onsaidplate with the axis 'thereof,perpendicular to said plate, a motor mounted on said plate in coaxialrelation within the coil, a rotary compressor supported by the plate atits side opposite the` coil `and extending below the top of the cabinetin coaxial relation tothe motor, va drivev shaft `connecting the motorand compressonandzagianmounted on the shaft for circulating air upwardlyalong the coil. l

, 3. A condenser unit comprising a horizontal base'platefa coil mountedabove the platei with the motor and compressor, a housing for ,t

pressor depending fromV the plate; "aA n; he,l

its axis perpendicular thereto, a motor Qmounted 4 on a vertical axiswithin thel coil, a rotary com` g pressor mounted below the plate incoaxial relation with the motor, a drive. shattcon tingA drive shaft forcirculating air upwardlyalo'ri'gi, the coil, and a substantiallybell-shapedhood of l heat radiating material surrounding thecoil in`proximity thereto, said hood having top yand bot-V tom air openings.

4. A condenser unit comprising a horizontal base plate adapted to restupon the top ofeagcab? inet, a coil mounted abovethe plate withitseaxiszcair openings. 1 e HENRY E. ELROD.

